Which of these is an example of a commodity?

A restaurant meal

Corn

A college lecture

A book, blog entry, or magazine article

Corn

Explanation:

A commodity can be defined as a basic good, a raw material and a primary agricultural product, that is to say, a good that has not gone through a manufacturing process; this type of goods can be traded or exchanged for products of similar value. Cereal grains like corns are an example of a commodity because they're primary agricultural products. Other examples of commodities are sugar, coffee, olives, almonds and mining products like copper and iron ore.